View Cluster Application Metrics with Ganglia

Ganglia is available with Amazon EMR releases 4.2 and above. Ganglia is an open source
project
which is a scalable, distributed system designed to monitor clusters and grids while
minimizing the impact on their performance. When you enable Ganglia on your cluster,
you can
generate reports and view the performance of the cluster as a whole, as well as
inspect the
performance of individual node instances. Ganglia is also configured to ingest and
visualize
Hadoop and Spark metrics. For more information, see Ganglia in the Amazon EMR Release Guide.